electron band gap moe # agzd is also the noise I made trying to figure out the right incantation to get this to work.
# specifically, we need -z to get it to read the *entire* file.
read -agzd \n _mizu_vcs_output <$_mizu_vcs_output_file
what i'm actually doing here: i want to update the vcs status of my prompt asynchronously, so i
- create a tempfile
- spawn a background process, which synchronously:
- tries the vcs backends (jj, then git)
- writes newline-delimited output to that file
- sends
SIGUSR1to the main process when it dies
- sends
- when the main process gets
SIGUSR1, it then - reads the output into the array
_mizu_vcs_output
- reads the output into the array
- tells fish to redraw the prompt
- the bit of the prompt responsible for the vcs reads from that array
the point of all of this is that i want
fish_prompt to execute inside a single frame, which means about 7ms. time git status gives about 8ms on my pretty small repo, and time command true is like 5ms. with the async hack, time fish_prompt is about 2ms.
jtl